Abstract
An unusual form of single crystal whiskers of β SiC was in vestigated in terms of the rheological properties of its suspensions in several fluids. Individual whiskers could not be separated intact from the fiber mass produced in the reactor. Capillary viscosity measurements were used to estimate the length of the fibers. An aspect ratio of 10,000 is obtained by the use of Burgers' equation for the viscosity of suspensions of rigid rods. The fibers are shown to be remarkably effective at low concen trations (<0.1%) in increasing the viscosity of a silicone, a hydro carbon and an alkylphosphonate fluid. The suspensions also exhibited pseudoplastic flow behavior.
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